First of all, hello, all!
I bought a 2004 streetKA yesterday at a bargain price. I was made aware that the central locking only worked with the key in the door. I took the car anyway and decided to get as far as I could before seeking advice...So, here goes!

1 - The key fob communicates with the car.
2 - Pressing the lock button causes the passenger side to lock, then unlock; drivers door remains silent; no lights flash.
3 - the key in the drivers door locks both doors.
4 - the key in passenger door locks the passenger door, then unlocks again.
5 - if I press the lock button on the key fob, whilst simultaneously, manually locking the drivers door causes the lights to flash, as the manual says, to show that the central locking has worked.
6 - if I disconnect the drives door like/trunk wiring and then press lock on the key fob, the lights flash and the passenger door locks.
7 - at no point has the alarm seemed to arm. It has not sounded or given me any indication that it's on.

That's as detailed as I have been with diagnostics. Here are my queries:

Would this have an affect on the alarm system not arming or am I looking at separate issues? (I've changed fuse 33, still nothing)

How do I get the locking motor out of the door and where is it?

I'm no electrician but with your guys' help, I might be able to solve the alarm problem!

To arm the alarm, the doors need to lock using the remote. Locking manually will not set the alarm. If your car is locking and then unlocking on the remote, it suggests that the alarm is being switched on and then off at the same time (hence the flashing lights).

Central door locking normally locks and unlocks if one of the doors isn't closed properly and the fact that the drivers door isn't activating may be the cause for the other door locking and unlocking again.

When you lock the drivers door manually while pressing the remote and the lights flash. This suggests to me that the alarm has armed. Try leaving it for 30 seconds and then unlock the passenger door using the key. That should set it off.

The problem does sound like the solenoid in the drivers door (if there is one) that is causing your problem

Thank you! I have managed, with the simultaneous keyfob/manual door lock technique, to get the lights to flash. I waited a few minutes and then opened the bonnet, the doors, the lot! No alarm :-(

The lights flash to confirm central locking, no mention in the manual of lights flashing to arm the alarm.... It's puzzling me. Is the alarm module the brass casing in the boot? Or is that just the alarm siren? Or both??

It seems that you may have to get the fob re-chipped according to my mechanic husband. I too have had the same problem with my StreetKa.

See how you get on.

Maxine

re-chipping the key has nothing to do with the remote central locking, to me it sounds like the mechanism in the drivers door is on it's way out and will need replacing, it's a common fault on mondeo's, so have a look on those forums for idea's.

will the car double lock by turning the key to unlock and then directly to lock, (It should flash the indicators)

You are better off without the alarm anyway as it's a pain in the bum. It is unreliable, goes off at the wrong times and will just run the battery flat rather than make people come running. Just make sure you can lock the doors and boot and forget the alarm.